Results 41 to 50 of about 4,438,483 (347)
Dynamics and Instabilities of Planar Tensile Cracks in Heterogeneous Media
, 1997 The dynamics of tensile crack fronts restricted to advance in a plane are studied. In an ideal linear elastic medium, a propagating mode along the crack front with a velocity slightly less than the Rayleigh wave velocity, is found to exist.
B. Cotterell +17 more
core +1 more source
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Fatigue life prediction of z-fibre pinned composite laminate under mode I loading [PDF]
, 2019 A hybrid method is presented combining linear elastic fracture mechanics with nonlinear damage mechanics that can predict the fatigue crack growth rate in z-fibre pinned composites under mode I loading.
Ayre, David +3 more
core +2 more sources
New Theory for Mode I Crack-tip Dislocation Emission
, 2017 A material is intrinsically ductile under Mode I loading when the critical stress intensity K Ie for dislocation emission is lower than the critical stress intensity K Ic for cleavage.
P. Andric, W. Curtin
semanticscholar +1 more source
The newfound relationship between extrachromosomal DNAs and excised signal circles
FEBS Letters, EarlyView.Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley +1 more source
Mathematics, 2022 In order to determine the effect of internal cracks on the tensile failure of materials, a hybrid finite–discrete element method was used to analyze the Brazilian disc test with cracks of different angles.
Xiaoyan Luo +3 more
doaj +1 more source
Cracking Mode Analysis of Crack Initiation in Rocks under Uniaxial Compression
Advance in Civil Engineering, 2019 Crack initiation is related to the behavior of the preexisting microcracks within a rock specimen, which suggests the specimen starts to fail. The determination of crack initiation stress is important for identifying the elastic stage and related ...
Y. Lou, Guangqing Zhang, Xiaoxiao Wang
semanticscholar +1 more source
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance Inspired by the survival war between the “spear” of mantis shrimps with Bouligand-type microstructures and the “shield” of abalone with nacreous staggered architectures, we design an architecture, a combination of Bouligand and nacreous ...
Kaijin Wu +7 more
semanticscholar +1 more source
In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2018 Fatigue crack propagation in a polycrystalline Ni-base superalloy was experimentally investigated at room temperature. Fatigue crack propagation tests were conducted under a constant ΔK condition to clarify the effect of grains crystal orientation, grain
Mana HIGAKI +6 more
doaj +1 more source